Abstract
The features of heat transferral capability between metallic (Cu) and non-metallic (TiO2) nanoparticles suspended in the engine-oil (EO) third-grade base-liquid has been analysed under the influence of strong magnetic field. The numerical investigation of system of coupled differential equations for third-grade nanofluid flow model is accomplished via Quasi-linearization method (QLM). The stretching horizontal sheet is heated through convective heat process assuming the special effects of thermal radiation, joule heating, heat generation and viscous dissipation in the energy equation. The mass suction and slip velocity at the boundary of the sheet has been taken into account to enhance fluidity of the engine-oil nanofluid. The prominent non-dimensional parameters controlling the flow and heat transfer characteristics of Cu-TiO2/ Engine-Oil nanofluid are estimated through graphical and tabular data. A novel graphical analysis for entropy generation versus magnetic retardation is projected for various parameters. Entropy generation is reduced by the velocity slip parameter but it is increased by the Reynolds number and Brinkman number. The enhanced lubricating properties of engine oil with mixing of TiO2-nanoparticles might be a useful industrial lubricant for magnetic refrigeration applications.
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